ISSN:
0030-493X
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The use of emitters which have been activated at high temperature in Field Ionization and Field Desorption mass spectrometry offers some important advantages over the usual emitter type activated at room-temperature. Higher thermal stability of the microneedles is achieved and the emitters are extremely resistant to chemical attack. It becomes possible to induce a thermal fragmentation of solid compounds adsorbed on the emitter surface between room-temperature and approximately 2000°C. The field anodes may be re-used many times without loss of quality. The problem of mass references is solved in Field Ionization/Field Desorption-Mass Spectrometry when high temperature emitters are used. The Field Ionization mass spectra of perfluorokerosene (PFK) and perfluorotributylamine display peaks in the mass range between m/e 50 to 800, with a resolution of up to 30000 (10% valley definition). A short description of a rapid and easy activation to produce high temperature microneedles is given.The following abbreviations are used throughout this paper: - TextHTHigh TemperatureRTRoom-TemperatureBATBest Anode TemperatureHRHigh ResolutionMSMass Spectrometry/Spectrum/SpectraEIElectron ImpactFIField IonizationCIChemical IonizationFDField Desorption
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/oms.1210060808
